20521635

素因数分解:

$3^1\times 5^1\times {\mathrm{17}}^1\times {\mathrm{23}}^1\times {\mathrm{3499}}^1$

素因数の和:3547

約数の個数: 32

約数和(自身を含む): 36288000

約数和(自身を除く): 15766365

約数列:

[1, 3, 5, 15, 17, 23, 51, 69, 85, 115, 255, 345, 391, 1173, 1955, 3499, 5865, 10497, 17495, 52485, 59483, 80477, 178449, 241431, 297415, 402385, 892245, 1207155, 1368109, 4104327, 6840545, 20521635]

約数ペア:

[(1, 20521635), (3, 6840545), (5, 4104327), (15, 1368109), (17, 1207155), (23, 892245), (51, 402385), (69, 297415), (85, 241431), (115, 178449), (255, 80477), (345, 59483), (391, 52485), (1173, 17495), (1955, 10497), (3499, 5865)]